Have both a Speer and HH...
I have both a Speer and an HH. Both have things that please me. I used the HH during my most recent AT thru attempt with both my homemade KAQ under quilt and the SS undercover.
Comfort wise, the HH is slightly more comfortable to sleep in for me at least. On the otherhand as noted it does have some issues that bother me. They both have to do with the underquilt more so than the hammock itself but when you are doing three season camping the UQ is a necessity. The problem for me is that stretching the quilt or SS foam to one side is stressful on the side tie-outs and the foam can tear easily. Thus for long term hiking. I will most likely use the Speer and the Peapod UQ exclusively. For short-term or car camping the HH will get the nod.
Other than the UQ issues I would venture to guess that I would use my HH 10 percent more than my Speer. Both do an adequate job of keeping me warm now down to the mid-20's and windy conditions.
I also prefer a slightly larger tarp coverage. I have a MacCat Standard which gives me the coverage I want without getting overboard on it. Yes there was one night about a mile from Blue Mt. in GA (shelter just before Unicoi Gap) where the winds blew and the rain came very hard and the rain blew thru the tarp and up under the tarp but that is probably one of the great exceptions to everyday use.
I did pickup some sil-nylon at a recent close-out sale of the local Minnesota Fabrics and Hancock Fabrics stores here in Michigan and have ideas to make a Cat Tarp of my own using the Black Cat template. This way I can custom tailor the tarp to cover better without getting into the next size commercial tarp available such as the MacCat Deluxe. Or if I can figure it out I like the Tarptent I have seen used with a hammock. That is another possibility.
I like Brians design but hey if I can make it custom to my dimensions then why not?
TOG